ObjectValuePairComparator.java |
1 /** 2 * Copyright (c) 2000-2009 Liferay, Inc. All rights reserved. 3 * 4 * 5 * 6 * 7 * The contents of this file are subject to the terms of the Liferay Enterprise 8 * Subscription License ("License"). You may not use this file except in 9 * compliance with the License. You can obtain a copy of the License by 10 * contacting Liferay, Inc. See the License for the specific language governing 11 * permissions and limitations under the License, including but not limited to 12 * distribution rights of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 20 * SOFTWARE. 21 */ 22 23 package com.liferay.portal.kernel.util; 24 25 import java.util.Comparator; 26 27 /** 28 * <a href="ObjectValuePairComparator.java.html"><b><i>View Source</i></b></a> 29 * 30 * @author Brian Wing Shun Chan 31 */ 32 public class ObjectValuePairComparator<K, V> 33 implements Comparator<ObjectValuePair<K, V>> { 34 35 public ObjectValuePairComparator() { 36 this(true); 37 } 38 39 public ObjectValuePairComparator(boolean asc) { 40 this(true, asc); 41 } 42 43 public ObjectValuePairComparator(boolean byKey, boolean asc) { 44 _byKey = byKey; 45 _asc = asc; 46 } 47 48 public int compare(ObjectValuePair<K, V> ovp1, ObjectValuePair<K, V> ovp2) { 49 if (_byKey) { 50 Comparable key1 = (Comparable)ovp1.getKey(); 51 Comparable key2 = (Comparable)ovp2.getKey(); 52 53 if (_asc) { 54 return key1.compareTo(key2); 55 } 56 else { 57 return -(key1.compareTo(key2)); 58 } 59 } 60 else { 61 Comparable value1 = (Comparable)ovp1.getValue(); 62 Comparable value2 = (Comparable)ovp2.getValue(); 63 64 if (_asc) { 65 return value1.compareTo(value2); 66 } 67 else { 68 return -(value1.compareTo(value2)); 69 } 70 } 71 } 72 73 private boolean _byKey; 74 private boolean _asc; 75 76 }